JavaScript千分符---正则实现

一般在JavaScript中实现千分符，是使用切割+连接一顿操作

这里尝试一下使用正则快速实现千分符-----支持小数

let num0 = '12'
let num1 = '123'
let num2 = '1234'
let num3 = '123456789'
let num4 = '1234567890'
let num5 = '12345678901'
let num6 = '123456789012'
let num7 = '1234567890123'

 
let r0 = num0.replace(/(d{1,3})(?=(d{3})+(?:[$|.]))/g, '$1,')
let r1 = num1.replace(/(d{1,3})(?=(d{3})+(?:[$|.]))/g, '$1,')
let r2 = num2.replace(/(d{1,3})(?=(d{3})+(?:[$|.]))/g, '$1,')
let r3 = num3.replace(/(d{1,3})(?=(d{3})+(?:[$|.]))/g, '$1,')
let r4 = num4.replace(/(d{1,3})(?=(d{3})+(?:[$|.]))/g, '$1,')
let r5 = num5.replace(/(d{1,3})(?=(d{3})+(?:[$|.]))/g, '$1,')
let r6 = num6.replace(/(d{1,3})(?=(d{3})+(?:[$|.]))/g, '$1,')
let r7 = num7.replace(/(d{1,3})(?=(d{3})+(?:[$|.]))/g, '$1,')

console.log(r0) // 12
console.log(r1) // 123
console.log(r2) // 1,234
console.log(r3) // 123,456,789
console.log(r4) // 1,234,567,890
console.log(r5) // 12,345,678,901
console.log(r6) // 123,456,789,012
console.log(r7) // 1,234,567,890,123